In a study of cell phone use and brain hemispheric​ dominance, an Internet survey was​ e-mailed to 2506subjects randomly selected from an online group involved with ears. 1046 surveys were returned. Construct a 90​% confidence interval for the proportion of returned surveys.     ​a) Find the best point estimate of the population proportion p.   ​b) Identify the value of the margin of error E.     ​c) Construct the confidence interval.     ​d) Write a statement that correctly interprets the confidence interval.

Use the sample data and confidence level given below to complete parts (a) through (d). In a study of cell phone use and brain hemispheric dominance, an Internet survey was e-mailed to 2335 subjects randomly selected from an online group involved with ears. 924 surveys were returned. Construct a 99% confidence interval for the proportion of returned surveys. E Click the icon to view a table of z scores. a) Find the best point estimate of the population proportion p. (Round to three decimal places as needed.) b) Identify the value of the margin of error E. E=L (Round to three decimal places as needed.) c) Construct the confidence interval. (Round to three decimal places as needed.) d) Write a statement that correctly interprets the confidence interval. Choose the correct answer below. O A. One has 99% confidence that the interval from the lower bound to the upper bound actually does contain the true value of the population proportion. O B. One has 99% confidence that the sample…

Use the sample data and confidence level given below to complete parts (a) through (d). In a study of cell phone use and brain hemispheric dominance, an Internet survey was e-mailed to 2460 subjects randomly selected from an online group involved with ears. 1005 surveys were returned. Construct a 95% confidence interval for the proportion of returned surveys. Click the icon to view a table of z scores. a) Find the best point estimate of the population proportion p. (Round to three decimal places as needed.)

Refer to the data set of 20 randomly selected presidents given below. Treat the data as a sample and find the proportion of presidents who were taller than their opponents. Use that result to construct a​ 95% confidence interval estimate of the population percentage. Based on the​ result, does it appear that greater height is an advantage for presidential​ candidates? Why or why​ not? Construct a​ 95% confidence interval estimate of the percentage of presidents who were taller than their opponents. If greater height was an​ advantage, then taller candidates should have won (more than,less than,exactly) ​50% of the elections. In this​ case, greater height (appears,does not appear) to be an advantage for presidential candidates because the confidence interval (does,does not) include​ 50%.

Lab 8 webassign.net/web/Student/Assignment-Responses/submit?dep=30432597&tags=autosave#question4852416_8 X WCh 4 Practice Assignment - BA X b Answered: A = {E2, E4} B = Suppose that we have a sample space with five equally likely experimental outcomes: E₁, E₂, E3, E4, E5. Let A = {E₂, E4} B = {E₁, E3} C = {E₁, E4, E5}. (a) Find P(A), P(B), and P(C). P(A) = 0.4 P(B) 0.4 P(C) = = 0.6 (b) Find P(A U B). P(A U B) = Are A and B mutually exclusive? They are = 0.8 (c) Find AC. (Enter your answer in set notation.) AC = {E1,E3,E5} Find CC. (Enter your answer in set notation.) cc = {E2,E3} Find P(AC) and P(CC). P(AC) = 0.6 P(CC) = = 0.4 mutually exclusive. Find P(A U BC). P(A U BC) = 0.6 { x + X (d) Find A U BC. (Enter your answer in set notation.) AU BC = {E2,E4, E5} M Update: